The F phrygian scale has 7 notes: F, Gb, Ab, Bb, C, Db and Eb. Its formula is 1 b2 b3 4 5 b6 b7 and its steps, in tones, are ½ – 1 – 1 – 1 – ½ – 1 – 1.
The phrygian mode is a minor scale with a minor second: a dark, Spanish color, widely used in flamenco and metal.
F phrygian
F Gb Ab Bb C Db Eb · 1 b2 b3 4 5 b6 b7
Colored dots: notes of the scale, the root is the darkest.